6x-5 =19, ¾x +15=21, 3(x-2) - 8 =7, x2 +18 = 27, 5(x3+6) -84 = 81, 7x = 4x - 6, 10= 15 -5x, x+ 3 (x-1) - 7 =6, 3x-2+3(x-1)=13, 2 +2(x+1)-2+5=9, (x+5):(-3)=3x-5, (2x+9):5=x+3.

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